Rothwell — Analogue accessories
Anniversary Custom
The world's only hum-cancelling step-up transformer for elite moving coil cartridges.
The Anniversary Custom stands as a landmark in analogue engineering, representing the pinnacle of Rothwell's transformer technology. Developed to celebrate decades of dedication to vinyl reproduction, this unit addresses the persistent challenge of external magnetic interference through an innovative and exclusive dual-core architecture.
Positioned as the ultimate interface for the most demanding low-output moving coil cartridges, the Anniversary Custom goes beyond the standard expectations of a step-up device. Its design philosophy centres on absolute signal purity, utilising high-quality components and meticulous hand-wound coils to ensure that the delicate output from your cartridge reaches your phono-stage completely uncorrupted.
The sonic character of the Anniversary Custom is defined by its exceptional transparency, vast bandwidth, and remarkable transient speed. By providing an incredibly quiet noise floor, it allows the listener to hear deeper into the recording, revealing textural nuances and spatial cues that are often lost in less capable systems. It is a tool for the uncompromising enthusiast who demands nothing less than the absolute best from their analogue front-end.
Key Features
01
Dual-core hum-cancelling design
Employs two transformer cores per channel to actively cancel pickup from stray external magnetic fields, delivering an industry-leading signal-to-noise ratio.
02
Precision hand-wound coils
Each transformer is wound in-house using multi-layer techniques to minimise inter-winding capacitance and maximise high-frequency extension.
03
Primary load adjustment
Six selectable settings allow for direct fine-tuning of the cartridge load impedance, ensuring perfect synergy with diverse cartridge types.
04
Secondary load adjustment
Six settings provide fine control over the transformer's performance and low-frequency extension, offering 36 possible load combinations.
Chapter 01
Design & Philosophy
The Anniversary Custom was born from a desire to overcome the limitations of conventional transformer design. By implementing a dual-core per-channel configuration, we created the only transformer of its kind capable of actively rejecting interference, effectively providing a sanctuary for the delicate micro-signals produced by high-end moving coil cartridges.
Chapter 02
Build & Materials
Constructed with low-loss core materials and housed in a vibration-damped chassis, the unit is built to exacting standards. Every connection and winding is designed to maintain signal integrity, with internal point-to-point wiring that reflects a deep respect for the art of traditional British audio manufacturing.
Chapter 03
Listening Notes
Reviewers and enthusiasts alike cite the Anniversary Custom's ability to render music with a unique sense of poise and clarity. It brings an expansive, natural quality to performances, removing the 'electronic' signature of lesser stages and allowing the recording to sound as immediate and lifelike as the original master.
Specifications
Turns ratio1:10
Voltage gain20 db
Core materialdual ferrite
Input impedanceuser adjustable
optimum transformer load impedance47k + 150pF
Bandwidth18Hz - 65kHz (+0/-3dB, 6 ohm source)
cartridge compatibility (o/p)0.25mV - 0.9mV
cartridge compatibility (imp.)internal impedance <12 ohms
Dimensions135 x 200 x 50 mm
Weight1kg